Annual sunspot numbers, 1700-1988                                               
     5.0    11.0    16.0    23.0    36.0    58.0    29.0    20.0    10.0     8.0
     3.0      .0      .0     2.0    11.0    27.0    47.0    63.0    60.0    39.0
    28.0    26.0    22.0    11.0    21.0    40.0    78.0   122.0   103.0    73.0
    47.0    35.0    11.0     5.0    16.0    34.0    70.0    81.0   111.0   101.0
    73.0    40.0    20.0    16.0     5.0    11.0    22.0    40.0    60.0    80.9
    83.4    47.7    47.8    30.7    12.2     9.6    10.2    32.4    47.6    54.0
    62.9    85.9    61.2    45.1    36.4    20.9    11.4    37.8    69.8   106.1
   100.8    81.6    66.5    34.8    30.6     7.0    19.8    92.5   154.4   125.9
    84.8    68.1    38.5    22.8    10.2    24.1    82.9   132.0   130.9   118.1
    89.9    66.6    60.0    46.9    41.0    21.3    16.0     6.4     4.1     6.8
    14.5    34.0    45.0    43.1    47.5    42.2    28.1    10.1     8.1     2.5
      .0     1.4     5.0    12.2    13.9    35.4    45.8    41.1    30.1    23.9
    15.6     6.6     4.0     1.8     8.5    16.6    36.3    49.6    64.2    67.0
    70.9    47.8    27.5     8.5    13.2    56.9   121.5   138.3   103.2    85.7
    64.6    36.7    24.2    10.7    15.0    40.1    61.5    98.5   124.7    96.3
    66.6    64.5    54.1    39.0    20.6     6.7     4.3    22.7    54.8    93.8
    95.8    77.2    59.1    44.0    47.0    30.5    16.3     7.3    37.6    74.0
   139.0   111.2   101.6    66.2    44.7    17.0    11.3    12.4     3.4     6.0
    32.3    54.3    59.7    63.7    63.5    52.2    25.4    13.1     6.8     6.3
     7.1    35.6    73.0    85.1    78.0    64.0    41.8    26.2    26.7    12.1
     9.5     2.7     5.0    24.4    42.0    63.5    53.8    62.0    48.5    43.9
    18.6     5.7     3.6     1.4     9.6    47.4    57.1   103.9    80.6    63.6
    37.6    26.1    14.2     5.8    16.7    44.3    63.9    69.0    77.8    64.9
    35.7    21.2    11.1     5.7     8.7    36.1    79.7   114.4   109.6    88.8
    67.8    47.5    30.6    16.3     9.6    33.2    92.6   151.6   136.3   134.7
    83.9    69.4    31.5    13.9     4.4    38.0   141.7   190.2   184.8   159.0
   112.3    53.9    37.5    27.9    10.2    15.1    47.0    93.8   105.9   105.5
   104.5    66.6    68.9    38.0    34.5    15.5    12.6    27.5    92.5   155.4
   154.7   140.5   115.9    66.6    45.9    17.9    13.4    29.2   100.2
